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不同盐胁迫对玉米种子萌发及幼苗生长的影响

河西学院学报 2024年第5期40卷 62-71页

作者：韩菊学汤琴文宋利茹张蕾河西学院人事处河西学院农业与生态工程学院河西学院厅市共建甘肃省食用菌遗传育种重点实验室河西学院甘肃省应用真菌工程实验室河西学院信息技术与传媒学院甘肃张掖734000

本研究以华单86、鹏玉1.、SK567、河农1.玉米品种为试验材料,采用5个NaCl浓度梯度(1.0、200、3.0、400、500mmol/L)处理种子,以蒸馏水作对照,对不同盐胁迫下玉米的发芽指标、幼苗形态指标及生理指标进行测定。结果表明:低浓度盐分对4... 详细信息

本研究以华单86、鹏玉1.、SK567、河农1.玉米品种为试验材料,采用5个NaCl浓度梯度(1.0、200、3.0、400、500mmol/L)处理种子,以蒸馏水作对照,对不同盐胁迫下玉米的发芽指标、幼苗形态指标及生理指标进行测定。结果表明:低浓度盐分对4个玉米品种的种子发芽率影响不大,高浓度NaCl条件显著降低品种河农1.种子的发芽率;随NaCl浓度的不断增加,发芽势、相对发芽指数和相对活力指数显著降低,株高、叶长和根长等形态生长受抑制,但河农1.受抑制程度相对较小。NaCl浓度越高,各品种与cK的脯氨酸含量差异越显著。在NaCl浓度为500mmol/L时脯氨酸含量均达到最大值,其中以河农1.的脯氨酸含量最高。随NaCl浓度的提高,各品种之间的MDA含量、相对电导率均升高,但增长幅度不一,SK567的MDA含量最高,河农1.的MDA含量最低;鹏玉1.、华单86的相对电导率增加较迅速,而SK567、河农1.则相对缓慢。综合不同盐胁迫下对4个玉米品种的萌发、幼苗生长以及生理指标的影响,4个玉米品种中耐盐性最强的品种为河农1.,其次为SK567,次之为鹏玉1.和华单86。

关键词：玉米盐胁迫种子萌发形态指标生理指标

Effects of coagulation-bath conditions on polyphenylsulfone ultrafiltration membranes

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chinese Journal of Chemical Engineering 2021年第6期34卷 332-340页

作者： Zhenghui Liu Jun Xiang Xiaoli Hu Penggao Cheng lei {1. Wei Du Songbo Wang Na tang Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization College of Chemical Engineering and Materials ScienceTianjin University of Science and TechnologyTianjin 300457China

Polyphenylsulfone(PPSU)ultrafiltration membrane with different structures was prepared by nonsolvent-induced phase *** effects of coagulation bath conditions(concentration and temperature)on membrane morphology,pure water flux,pore size,porosity,and contact angle were studied and discussed based on ternary-phase *** indicated that water had stronger coagulant power than ethanol,and that the morphology of the membrane prepared from the polyphenylsulfone/1.methyl-2-pyrrolidinone/H_(2)O(PPSU/NMP/H_(2)O)system had finger-like ***,sponge-like structures were observed for the PPSU/NMP/(NMP-H_(2)O)and PPSU/NMP/(70 NMP-EtOH-H_(2)O)*** also greatly influenced on membrane *** to the Scanning electronic microscopy(SEM)image,the composition(mass fraction)of casting solution is 1.%PPSU-84%NMP and the coagulation bath consisting of 70%NMP-26%H_(2)O-4%C_(2)H_(5)***,the PPSU ultrafiltration membrane with spong-like was prepared under 8℃coagulation *** formation of sponge-like structure reduces the pure water flux of ppsu membrane from 488.3. L·m^(-2)·h^(-1.to 3..04 L·m^(-2)·h^(-1..It also reduces the gas permeability,porosity,and pore size of the *** addition of ethanol and NMP into the coagulation bath increases the roughness of the PPSU ultrafiltration membrane and reduces the hydrophilicity of the membrane.

关键词： PPSU ultrafiltration membrane Ternary-phase diagram Coagulation bath conditions Sponge-like structures

Effect of ethylene vinyl acetate content on the performance of VMD using HDPE co-blending membrane

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chinese Journal of Chemical Engineering 2019年第5期27卷 1058-1066页

作者： Na tang Xinxin Hua Zhao Li {1. zhang Jiating Wang Jun Xiang Penggao Cheng Xuekui Wang College of Chemical Engineering and Materials Science Tianjin University of Science & TechnologyTianjin 300457China Tianjin Key Laboratory of Marine Resources and Chemistry Tianjin University of Science & TechnologyTianjin 300457 China

Membranes were fabricated with high-density polyethylene (HDPE) and ethylene vinyl acetate (EVA) blend through thermally induced phase separation and were then used for vacuum membrane distillation (VMD). The membranes were supported by non woven polyester fabric with a special cellular structure. Different membrane samples were obtained by adjusting the polymer concentration, HDPE/EVA weight ratio, and coagulation bath temperature. The membranes were characterized by scanning electron microscopy (SEM) analysis, contact angle test, and evaluation of porosity and pore size distribution. A series of VMD tests were conducted using aqueous NaCI solution (0.5 mol·L^-1. at a feed temperature of 65 ℃ and permeate side absolute pressure of 3.kPa. The membranes showed excellent performance in water permeation flux, salt rejection, and long-term sta-bility. The HDPE/EVA co-blending membranes exhibited the largest permeation flux of 23.87 kg·m^-2·h^-1. and benign salt rejection of ≥99.9%.

关键词： Thermally induced phase separation High-density polyethylene Ethylene vinyl acetate Membrane Separation Microstructure

Boosting multi-hole water oxidation catalysis on hematite photoanodes under low bias

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Science China Chemistry 2023年第3期66卷 896-903页

作者： lei Wu Daojian {1. Jing Xue Shuobo Wang Hongwei Ji Chuncheng Chen Yuchao zhang Jincai Zhao Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of chinese academy of sciences Beijing 100049China

The accumulation of multiple surface holes is considered to be the key to efficient photoelectrochemical(PEC)water *** PEC water oxidation studies commonly apply high potentials(>1.2 VRHE)to achieve this *** how to complete multi-hole transfer under low bias(1.2 VRHE)remains ***,we find that,on a typical visible-light photoanode,hematite(α-Fe_(2)O_(3.),UV excitation plays a indispensable role in driving multi-hole water oxidation under low *** with the visible-light excitation,the UV excitation promotes the formation of adjacent surface-trapped holes onα-Fe_(2)O_(3. at 0.9VRHE,thereby increasing the reaction order of surface holes from~1.to~2 and improving the PEC water oxidation activity by one order of *** UV irradiation reduces the formation probability of self-trapped excitons and results in~3.to 5-fold increase of surface *** advantages enable the UV excitation to contribute about 40%to the total photocurrent under 1.solar illumination,even though its energy only occupies 6%of the incident *** mechanism is also applicable to boost selective two-hole oxidation of thioether at 0.1.VFc/Fc+and nitrite at 0.9 VRHE.

关键词： hematite photo(electro)catalysis water oxidation excitation wavelength multi-hole catalysis

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银杏叶多糖的系统分离纯化与单糖组成研究

食品科技 2018年第5期43卷 186-190页

作者：尹雯夏玮徐志珍张文清宋金星吴梦琪曾类文华东理工大学化学与分子工程学院上海200237 云南林缘香料有限公司易门651100

以水提银杏叶粗多糖为研究对象,利用DEAE-Sepharose Fast Flow离子交换层析柱分离,得到电荷性质不同的4个亚组分PGBL_0、PGBL_1.PGBL_2、PGBL_3.利用Sepharcyl-3.0凝胶柱层析对PGBL_1.PGBL_2 2种主要组分进行进一步分离纯化,得到4种... 详细信息

以水提银杏叶粗多糖为研究对象,利用DEAE-Sepharose Fast Flow离子交换层析柱分离,得到电荷性质不同的4个亚组分PGBL_0、PGBL_1.PGBL_2、PGBL_3.利用Sepharcyl-3.0凝胶柱层析对PGBL_1.PGBL_2 2种主要组分进行进一步分离纯化,得到4种均一多糖PGBL_(1.)、PGBL_(1.)、PGBL_(2A)、PGBL_(2B),其重均相对分子质量分别为1.4×1.~4、9.0×1.~3.1.2×1.~5和3.0×1.~4。采用1.苯基-3.甲基-5-吡唑啉酮(PMP)衍生法对4种均一多糖进行单糖组成分析,PGBL_(1.)由鼠李糖、半乳糖醛酸、半乳糖和阿拉伯糖组成,摩尔比为2.1.:1.00:2.50:6.88;PGBL_(1.)由甘露糖、鼠李糖、葡萄糖醛酸、半乳糖醛酸、半乳糖和阿拉伯糖组成,摩尔比为1.00:3.50:1.00:1.50:6.75:1..50;P G B L_(2 B)由甘露糖、鼠李糖、葡萄糖醛酸、半乳糖醛酸、半乳糖和阿拉伯糖组成,摩尔比为2.50:4.83.3.83.1.00:3.00:3.00;PGBL_(2A)由甘露糖、鼠李糖、葡萄糖醛酸组成,摩尔比为2.1.:1.57:1.00。

关键词：银杏叶多糖系统分离纯化离子交换柱层析凝胶过滤柱层析单糖组成

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异侧竖缝式鱼道的数值模拟及试验研究

中国农村水利水电 2024年第2期 165-171页

作者：韩雷张以闯张帅康田振华高宇李洋黑龙江省水利科学研究院哈尔滨150080 黑龙江大学水利电力学院哈尔滨150080

竖缝式鱼道具有隔板型式简单、水流条件好、主流位置明确等特点,适宜喜爱不同水层鱼类洄游,是目前应用最为广泛的过鱼工程。参考规范要求,以实际工程为例,初步设计3.鱼道池室隔板型式,利用数值模拟的方法,以第1.鱼道池室结构搭建数学... 详细信息

竖缝式鱼道具有隔板型式简单、水流条件好、主流位置明确等特点,适宜喜爱不同水层鱼类洄游,是目前应用最为广泛的过鱼工程。参考规范要求,以实际工程为例,初步设计3.鱼道池室隔板型式,利用数值模拟的方法,以第1.鱼道池室结构搭建数学模型计算出的竖缝位置流速和池室表层水流流态,与物理模型试验结果进行对比,验证数学模型隔板型式尺寸优化的合理性。根据池室内的水力特性优化隔板型式,对确定的优化隔板型式以比尺为1.5的局部物理模型试验对不同竖缝处不同水深进行流速测量,以尺为1.20的整体物理模型试验对竖缝处流速以及沿程水深进行测量。试验结果表明,当鱼道出口水深不小于进口水深时,即运行工况1.运行工况4,各隔板竖缝附近流速均小于设计流速1.2 m/s,当鱼道出口水深小于进口水深时,即运行工况2和运行工况3.鱼道进口处隔板竖缝附近流速较大,运行工况2时,最大流速为1.3.0} m/s;运行工况3.,最大流速为1.561.m/s,均超过设计流速1.2 m/s。建议鱼道在工况1.工况4条件下运行。同时对始水状态下鱼道的水力特性进行分析,建议采用流速为4 m/s的冲击流速值加强对鱼道首部数级水池隔板与导板的结构设计。

关键词：水力学竖缝式鱼道设计模型试验分析

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水下珊瑚双向反射率观测技术的研究

光谱学与光谱分析 2024年第4期44卷 1098-1105页

作者：谢栢成许占堂杨跃忠曾凯张雨刘永明周雯李彩中国科学院南海海洋研究所热带海洋环境国家重点实验室广东广州510301 中国科学院大学北京100049 南方海洋科学与工程广东省实验室广东广州511458

遥感作为一种高效海洋环境监测手段,可以对海底各种底质类型分布及其状态变化进行同步大面积监测。目前,海底底质反射率观测技术主要为单个角度观测,开展底质多角度光反射特性观测技术的研究,分析不同底质双向反射分布函数(BRDF)特征,... 详细信息

遥感作为一种高效海洋环境监测手段,可以对海底各种底质类型分布及其状态变化进行同步大面积监测。目前,海底底质反射率观测技术主要为单个角度观测,开展底质多角度光反射特性观测技术的研究,分析不同底质双向反射分布函数(BRDF)特征,对于遥感高精度监测浅水海区底质具有重要意义,在满足遥感对复杂底质类型精确区分的同时能做到对底质更细微的动态变化监测。采用双通道同步测量的方法,设计了一套简便的海底底质双向反射率测量系统,获取了水下珊瑚及细沙底质的反射率特征数据。在大亚湾海域开展了现场测量,数据分析表明:(1.岸上沙质的BRDF特征:在400~700 nm内,当天顶角不变时(θ=20°,40°或60°),不同方位角(θ=0°,45°,1.5°,1.0°,225°和3.0}°)所测得的反射率值标准偏差小于1.5%;当方位角不变时(θ=0°,45°,1.5°,1.0°,225°或3.0}°),不同天顶角上的反射率值标准偏差均不大于1.7%,表明岸上沙质的BRDF变化较小,具有朗伯体特性;水下沙质的BRDF特征:在400~700 nm内,当天顶角不变时,不同方位角所测得的反射率值标准偏差随着波长的增大而增大;在400 nm时,反射率值的标准偏差为3.8%,在700 nm时,反射率值标准偏差递增至1.%。水下沙质的BRDF表现为各向同性特征。(2)水下珊瑚BRDF特征:在天顶角不变时,不同方位角上所测得的反射率值标准偏差随着波长的增加呈现先增加后减小,而后激增的趋势。从400到605 nm,标准偏差从1.升至2%,而后从605到675 nm,标准偏差从2%降至1.2%,在675~700 nm,标准偏差从1.2%增至4.9%。现场测试数据分析结果表明本套水底双向反射测量系统能有效测量多种海底底质的反射光谱。通过现场获取的测量数据,对沙质和珊瑚两种典型底质的反射率光谱及BRDF进行了初步分析,为后续采用遥感手段反演浅水区底质及动态变化(如,珊瑚生长状态)提供多种底质多观测角度的反射率光谱特征。

关键词：水下双向反射珊瑚各向异性底质反射率光学浅水遥感

Study on the Separation of Bromine-water by Membrane Pervaporation Technology

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 328-330页

作者： HAN Huaiyuan XING Chengfei zhang {1. tang Na Wang Xuekui College of Marine Science and Engineering Tianjin University of Science & Technology Tianjin Key Laboratory of Marine Resources and Chemistry

1.Introduction Bromine,an important industrial raw material,was widely applied in industry,agriculture and *** present,many methods of producing bromine have been *** air blowing method and steam distillation

关键词： pervaporation polyurethane bromine-water system

GmSAP5,a soybean A20/AN1.domain-containing stress-associated protein gene activated by GmAREB3.increases drought stress resistance in soybean by mediating ABA signaling

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The Crop Journal 2022年第6期10卷 1601-1610页

作者： Zehao Hou Xiangzhan zhang Yimiao {1. Taifei Yu lei Zheng Jun Chen Yongbin Zhou Yongwei Liu Ming Chen Zhao-Shi Xu Youzhi Ma Institute of Crop sciences Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic ImprovementKey Laboratory of Biology and Genetic Improvement of Triticeae CropsMinistry of AgricultureBeijing 100081China Zhengzhou Fruit Research Institute Chinese Academy of Agricultural SciencesZhengzhou 450009HenanChina Beijing Engineering Research Center for Hybrid Wheat The Municipal Key Laboratory of the Molecular Genetics of Hybrid WheatBeijing Academy of Agriculture and Forestry SciencesBeijing 100097China Institute of Genetics and Physiology Hebei Academy of Agriculture and Forestry Sciences/Plant Genetic Engineering Center of Hebei ProvinceShijiazhuang 050051HebeiChina

Drought stress impairs crop growth and ***-associated proteins(SAPs),a class of zinc finger proteins containing the A20/AN1.domain,function in various stress responses in ***,little is known about the function of SAPs in drought-stress responses in soybean,an oil and protein *** report that a GmSAP5 protein confers drought tolerance by increasing sensitivity to abscisic acid(ABA)and reducing stomatal *** and RNA interference of GmSAP5in soybean hairy roots resulted in elevated resistance and sensitivity to drought stress,*** and proline contents increased in GmSAP5-overexpressing plants under water-deficit *** water loss rates and higher relative water contents were observed in GmSAP5-overexpressing plants,resulting in increased drought-stress resistance.A yeast one-hybrid assay and luciferase transient transcriptional activity assay showed that GmAREB3.an AREB/ABF transcription factor,could bind to the promoter of GmSAP5 and activate its *** results suggest that GmSAP5 acts downstream of GmAREB3.and improves drought-stress resistance by mediating ABA sign{3..

关键词： Soybean GmSAP5 GmAREB3 Drought stress ABA